Folding machine



Filed Jan. 5, 1951 Patented Nov. 17, 1931 UNITED STATES PATENT OFFICEEDWIN FRISCH, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO NORTH AMERICAN PRESS,OF MILWAUKEE, WISCONSIN, A CORPORATION OF \VISCONSIN FOLDING MACHINEApplication filed January 5, 1931. Serial No. 506,597.

This invention relates in general to folding machines and moreparticularly of the type in which the leaves folded from a sheet areadhesively united along a line of fold.

An inherent disadvantage in this type of machine as heretoforeconstructed has been the liability of the paste applied to the sheet togum the feed rollers. Patent 1,543,354, granted June 23, 1925, to F. T.-Zacher for a folding machine discloses a folding machine of the samegeneral type as that embodied in the present invention but has its pasteapplying mechanism in the form of anotched disc arranged in advance ofthe buckling rolls. In this construction an attempt is made to avoidgumming of the buckling or feed rolls by scoring or grooving the rollliable to have contact with the line of paste or adhesive. In practiceit 30 has been found that notwithstanding the provision of the scoringor grooving some paste will find its way onto the active or unbrokensurface of the exposed buckling roll and as a consequence the roll willbe gummed and the product of the machine impaired or rendered unfit foruse,

The present invention provides a folding machine of this character whichhas paste applying means so organized therewith as to preclude anypossibility of the buckling rolls or other rolls of the machine beinggummed with the paste and does this While avoiding the necessity ofgrooving or scoring the rolls. Furthermore, a folding machineconstructed in accordance with the present invention is adapted for highspeed operation.

Another object is to provide a folding machine of this character whichis of simple and durable contraction, reliable and effective inoperation and easy and comparatively inexpensive to manufacture.

Other objects and advantages reside in certain novel features of theconstruction, arrangement and combination of parts which will behereinafter more fully described and particularly pointed out in theappended claims. reference being had to the accompanying drawings,forming a part of this specification, and in which:

Figure 1 is a fragmentary view partly in side elevation and partly inlongitudinal vertical section showing a folding machine embodying thepresent invention;

Figure 2 is a detail perspective view 0 the supporting bracket for theadhesive reservoir; and

Figures 3 and 4 are perspective views illustrating the manner in whichthe machine folds and adhesively unites a sheet to provide a pamphlet.

Referring to the drawings, the numeral 1 designates the folding machinegenerally. This type of folding machine is well known and widely usedand is known in the art as the Cleveland folder. For this reason thedetails of the machine structure are not shown as it is sufiicient forthe purposes of the present invention to understand that the machine hassuitable frame 2 supporting the buckling, feeding and folding rollsdesignated at 3, 4, 5, 6 and 7. The sheet S is fed through the bucklingrolls 3 and 4 across a supporting plate or table 20 until it strikes thestops or abutments 8 whereupon it is buckled as indicated at B and thuscomes under the influence of the rolls 4 and 5 and is folded thereby.Subsequently, the sheet is again folded along its median line M andafterwards the lower edge of the sheet is cut so as to provide thepamphlet designated generally at P and made upof leaves L L", L and L by{conventional mechanism (not shown) of the folder. The leaves of thepamphlet are adhesively united as indicated at A in Figure3 and theadhesive uniting the leaves extends along the median line M. \Vith thepresent invention the adhesive is applied to the portion of. the sheet Sthat passes under the guide 8 and along the table 20. For applying theadhesive a spray gun designated generally at 9 is provided and has anatomizer 10 of any suitable construction supplied with compressed airfrom an airline 11 and supplied with liquid adhesive from a reservoir 12through a connection 13, the connection 13 extending from the bottom ofthe reservoir 12 to the tip portion of the spraygun.- The spray gun 9 isprovided with aconventional needle Valve 15 which coacts with thedischarge orifice of the atomizer to regulate the amount of atomizedadhesive or glue sprayed or issuing from the orifice of the atomizer.The reservoir is carried by a cross bar provided with a seat 15 for thereservoir and having depending attaching portions Iilfastened to theside members of the machine. The tip port-ionof the spray gun is locatedust behind the guide 8 and close up to the path of travel ofthe sheet S.The critical relation between the spray gun and the machine is thepositioning of the same just beyond the buckling roll 3 so that thepaste or adhesive is not applied until after the paper leaves thebuckling roll. In this way gnmming of-the rolls is avoidedfor theportion of the paper which passes through the buckling roll and isexposed to the air gun is thereafter coveredduringthe next foldingoperation and beforeit can come line of the sheet as it travels towardand away from the abutments 8 andat the times when no sheet underliesthe spray gun 9 the adhesive issues through an; opening 21 in the tableand onto a collector 22.

The invention claimed is:

1. A folding machine comprising in .combination with sheet folding andfeeding mechanism including upper and lower buckling rolls, a of meansfor applying adhesive to aportion .of the-sheet to be folded and.comprising a spray gun supported just beyond the buckling rolls andinclose proximity to the path of travel of the portion of the sheetinitially fed through the buckling rolls whereby to apply the adhesiveto a portionof the sheet which in the subsequent operations ofthemachine is covered by an unsprayed portiouof the sheet. l

2. Avfolding machine comprising-incombination with .sheet folding andfeeding mechanism includingupper and lower buckling rolls, .of meansfor-applying adhesive to a portion of the sheet to be folded andcomprising a. spray gun supported just beyond the bucklingrolls andinclose proximity to the path oftravel of the-portion ofthe sheetinitially fed through the buckling rolls wherebyto apply the adhesive toa portion ofthe sheet which in the subsequent-operations of the "machineis covered lay-.2111 unsprayed portion of the sheet, areservoir for theadhesive having an outlet connected to the spray ,gun and meanscoactingwvith the reservoir for supporting the sameand the air gun.

'3. A folding machine comprising upper and lower buckling rolls, afolding roller scoacting with the lower buckling roller abutmentmeansengageable with an edge of the sheet fedthrough the bucklingrollsto'buckle an intermediate portion of the sheet in be tween the lowerbuckling roll and its cooperable folding roller, and a spray gunpositioned to spray a line of adhesive to the sheet as it is fed fromthe buckling rolls to the abutment means and then back from theabut-ment'm vans through the lower buckling roll and its cooperablefolding roller.

4. A folding machine comprising upper andlower buckling rolls,-a foldingroller coacting With-the lower buckling roller, abutment meansengageable with an edge of the sheet fedthrough the buckling rolls tobuckle an intermediate portion of the sheet in between the lowerbuckling roll and its cooperable folding roller, a table supporting the-sheet betweenthe.buckling rolls and the abutment ineans,iuida spray gunpositioned to spray-ailineof adhesive tothe-sheetas it is fed fromthebuckling rolls to the abutment means and then back from the abutmentmeans through the lower buckling roll and EDVIN "FRISCH.

nature.

